What part of speech is lesson?

"Lesson" can be a few different parts of speech depending on how it's used in a sentence:

* Noun: This is the most common usage. It refers to a period of learning or instruction.

* Example: "The teacher gave us a difficult lesson on grammar."

* Verb: This usage is less common, but it means to teach something.

* Example: "She lessoned the children on the importance of honesty."

Let me know if you have a specific sentence in mind and I can tell you which part of speech "lesson" is acting as!